diff --git a/src/common/coordinates.cpp b/src/common/coordinates.cpp
index 12eeb2b9..b459ec31 100644
--- a/src/common/coordinates.cpp
+++ b/src/common/coordinates.cpp
@@ -1,50 +1,16 @@
 #include "wgs84.h"
 #include "coordinates.h"
 
-#define MIN_LAT deg2rad(-90.0)
-#define MAX_LAT deg2rad(90.0)
-#define MIN_LON deg2rad(-180.0)
-#define MAX_LON deg2rad(180.0)
-
-qreal Coordinates::distanceTo(const Coordinates &c) const
+double Coordinates::distanceTo(const Coordinates &c) const
 {
-	qreal dLat = deg2rad(c.lat() - _lat);
-	qreal dLon = deg2rad(c.lon() - _lon);
-	qreal a = pow(sin(dLat / 2.0), 2.0)
+	double dLat = deg2rad(c.lat() - _lat);
+	double dLon = deg2rad(c.lon() - _lon);
+	double a = pow(sin(dLat / 2.0), 2.0)
 	  + cos(deg2rad(_lat)) * cos(deg2rad(c.lat())) * pow(sin(dLon / 2.0), 2.0);
 
 	return (WGS84_RADIUS * (2.0 * atan2(sqrt(a), sqrt(1.0 - a))));
 }
 
-QPair<Coordinates, Coordinates> Coordinates::boundingRect(qreal distance) const
-{
-	qreal radDist = distance / WGS84_RADIUS;
-
-	qreal minLat = deg2rad(_lat) - radDist;
-	qreal maxLat = deg2rad(_lat) + radDist;
-
-	qreal minLon, maxLon;
-	if (minLat > MIN_LAT && maxLat < MAX_LAT) {
-		qreal deltaLon = asin(sin(radDist) / cos(_lat));
-		minLon = deg2rad(_lon) - deltaLon;
-		if (minLon < MIN_LON)
-			minLon += 2.0 * M_PI;
-		maxLon = deg2rad(_lon) + deltaLon;
-		if (maxLon > MAX_LON)
-			maxLon -= 2.0 * M_PI;
-	} else {
-		// a pole is within the distance
-		minLat = qMax(minLat, MIN_LAT);
-		maxLat = qMin(maxLat, MAX_LAT);
-		minLon = MIN_LON;
-		maxLon = MAX_LON;
-	}
-
-	return QPair<Coordinates, Coordinates>(Coordinates(rad2deg(qMin(minLon,
-	  maxLon)), rad2deg(qMin(minLat, maxLat))), Coordinates(rad2deg(qMax(minLon,
-	  maxLon)), rad2deg(qMax(minLat, maxLat))));
-}
-
 #ifndef QT_NO_DEBUG
 QDebug operator<<(QDebug dbg, const Coordinates &c)
 {
diff --git a/src/common/coordinates.h b/src/common/coordinates.h
index fed0390f..e35b314e 100644
--- a/src/common/coordinates.h
+++ b/src/common/coordinates.h
@@ -2,7 +2,6 @@
 #define COORDINATES_H
 
 #include <cmath>
-#include <QPair>
 #include <QDebug>
 
 #ifndef M_PI
@@ -15,14 +14,14 @@ class Coordinates
 {
 public:
 	Coordinates() {_lon = NAN; _lat = NAN;}
-	Coordinates(qreal lon, qreal lat) {_lon = lon; _lat = lat;}
+	Coordinates(double lon, double lat) {_lon = lon; _lat = lat;}
 
-	qreal &rlon() {return _lon;}
-	qreal &rlat() {return _lat;}
-	void setLon(qreal lon) {_lon = lon;}
-	void setLat(qreal lat) {_lat = lat;}
-	qreal lon() const {return _lon;}
-	qreal lat() const {return _lat;}
+	double &rlon() {return _lon;}
+	double &rlat() {return _lat;}
+	void setLon(double lon) {_lon = lon;}
+	void setLat(double lat) {_lat = lat;}
+	double lon() const {return _lon;}
+	double lat() const {return _lat;}
 
 	bool isNull() const
 	  {return std::isnan(_lon) && std::isnan(_lat);}
@@ -30,11 +29,10 @@ public:
 	  {return (_lon >= -180.0 && _lon <= 180.0
 	    && _lat >= -90.0 && _lat <= 90.0);}
 
-	qreal distanceTo(const Coordinates &c) const;
-	QPair<Coordinates, Coordinates> boundingRect(qreal distance) const;
+	double distanceTo(const Coordinates &c) const;
 
 private:
-	qreal _lat, _lon;
+	double _lat, _lon;
 };
 
 inline bool operator==(const Coordinates &c1, const Coordinates &c2)
diff --git a/src/common/rectc.cpp b/src/common/rectc.cpp
index 8c0dd430..76a0a4c5 100644
--- a/src/common/rectc.cpp
+++ b/src/common/rectc.cpp
@@ -1,5 +1,41 @@
+#include "wgs84.h"
 #include "rectc.h"
 
+#define MIN_LAT deg2rad(-90.0)
+#define MAX_LAT deg2rad(90.0)
+#define MIN_LON deg2rad(-180.0)
+#define MAX_LON deg2rad(180.0)
+
+RectC::RectC(const Coordinates &center, double radius)
+{
+	double radDist = radius / WGS84_RADIUS;
+	double radLon = deg2rad(center.lon());
+	double radlat = deg2rad(center.lat());
+
+	double minLat = radlat - radDist;
+	double maxLat = radlat + radDist;
+
+	double minLon, maxLon;
+	if (minLat > MIN_LAT && maxLat < MAX_LAT) {
+		double deltaLon = asin(sin(radDist) / cos(radlat));
+		minLon = radLon - deltaLon;
+		if (minLon < MIN_LON)
+			minLon += 2.0 * M_PI;
+		maxLon = radLon + deltaLon;
+		if (maxLon > MAX_LON)
+			maxLon -= 2.0 * M_PI;
+	} else {
+		// a pole is within the distance
+		minLat = qMax(minLat, MIN_LAT);
+		maxLat = qMin(maxLat, MAX_LAT);
+		minLon = MIN_LON;
+		maxLon = MAX_LON;
+	}
+
+	_tl = Coordinates(rad2deg(minLon), rad2deg(maxLat));
+	_br = Coordinates(rad2deg(maxLon), rad2deg(minLat));
+}
+
 RectC RectC::operator|(const RectC &r) const
 {
 	if (isNull())
@@ -134,7 +170,8 @@ void RectC::unite(const Coordinates &c)
 #ifndef QT_NO_DEBUG
 QDebug operator<<(QDebug dbg, const RectC &rect)
 {
-	dbg.nospace() << "RectC(" << rect.topLeft() << ", " << rect.size() << ")";
+	dbg.nospace() << "RectC(" << rect.topLeft() << ", " << rect.bottomRight()
+	  << ")";
 	return dbg.space();
 }
 #endif // QT_NO_DEBUG
diff --git a/src/common/rectc.h b/src/common/rectc.h
index 3279aa73..ce61e14b 100644
--- a/src/common/rectc.h
+++ b/src/common/rectc.h
@@ -2,7 +2,6 @@
 #define RECTC_H
 
 #include <QDebug>
-#include <QSizeF>
 #include "coordinates.h"
 
 class RectC
@@ -11,6 +10,7 @@ public:
 	RectC() {}
 	RectC(const Coordinates &topLeft, const Coordinates &bottomRight)
 	  : _tl(topLeft), _br(bottomRight) {}
+	RectC(const Coordinates &center, double radius);
 
 	bool isNull() const
 	  {return _tl.isNull() && _br.isNull();}
@@ -19,14 +19,9 @@ public:
 
 	Coordinates topLeft() const {return _tl;}
 	Coordinates bottomRight() const {return _br;}
-
 	Coordinates center() const
 	  {return Coordinates((_tl.lon() + _br.lon()) / 2.0,
 	    (_tl.lat() + _br.lat()) / 2.0);}
-	qreal width() const {return  _br.lon() - _tl.lon();}
-	qreal height() const {return  _br.lat() - _tl.lat();}
-
-	QSizeF size() const {return QSizeF(width(), height());}
 
 	RectC operator|(const RectC &r) const;
 	RectC &operator|=(const RectC &r) {*this = *this | r; return *this;}
diff --git a/src/data/poi.cpp b/src/data/poi.cpp
index fe2fd726..311916a1 100644
--- a/src/data/poi.cpp
+++ b/src/data/poi.cpp
@@ -1,5 +1,6 @@
 #include <QFile>
 #include <QDir>
+#include "common/rectc.h"
 #include "data.h"
 #include "poi.h"
 
@@ -101,12 +102,11 @@ QList<Waypoint> POI::points(const Path &path) const
 	QSet<int>::const_iterator it;
 
 	for (int i = 0; i < path.count(); i++) {
-		const Coordinates &c = path.at(i).coordinates();
-		QPair<Coordinates, Coordinates> br = c.boundingRect(_radius);
-		min[0] = br.first.lon();
-		min[1] = br.first.lat();
-		max[0] = br.second.lon();
-		max[1] = br.second.lat();
+		RectC br(path.at(i).coordinates(), _radius);
+		min[0] = br.topLeft().lon();
+		min[1] = br.bottomRight().lat();
+		max[0] = br.bottomRight().lon();
+		max[1] = br.topLeft().lat();
 
 		_tree.Search(min, max, cb, &set);
 	}
@@ -124,13 +124,11 @@ QList<Waypoint> POI::points(const Waypoint &point) const
 	qreal min[2], max[2];
 	QSet<int>::const_iterator it;
 
-	const Coordinates &c = point.coordinates();
-
-	QPair<Coordinates, Coordinates> br = c.boundingRect(_radius);
-	min[0] = br.first.lon();
-	min[1] = br.first.lat();
-	max[0] = br.second.lon();
-	max[1] = br.second.lat();
+	RectC br(point.coordinates(), _radius);
+	min[0] = br.topLeft().lon();
+	min[1] = br.bottomRight().lat();
+	max[0] = br.bottomRight().lon();
+	max[1] = br.topLeft().lat();
 
 	_tree.Search(min, max, cb, &set);
 
diff --git a/src/map/mapfile.cpp b/src/map/mapfile.cpp
index abe5eca6..890a24c5 100644
--- a/src/map/mapfile.cpp
+++ b/src/map/mapfile.cpp
@@ -54,13 +54,13 @@ int MapFile::parse(QIODevice &device, QList<CalibrationPoint> &points,
 				int latd = list.at(6).trimmed().toInt(&res);
 				if (!res)
 					ll = false;
-				qreal latm = list.at(7).trimmed().toFloat(&res);
+				double latm = list.at(7).trimmed().toDouble(&res);
 				if (!res)
 					ll = false;
 				int lond = list.at(9).trimmed().toInt(&res);
 				if (!res)
 					ll = false;
-				qreal lonm = list.at(10).trimmed().toFloat(&res);
+				double lonm = list.at(10).trimmed().toDouble(&res);
 				if (!res)
 					ll = false;
 				if (ll && list.at(8).trimmed() == "S") {
@@ -75,10 +75,10 @@ int MapFile::parse(QIODevice &device, QList<CalibrationPoint> &points,
 				p.zone = list.at(13).trimmed().toInt(&res);
 				if (!res)
 					p.zone = 0;
-				qreal ppx = list.at(14).trimmed().toFloat(&res);
+				double ppx = list.at(14).trimmed().toDouble(&res);
 				if (!res)
 					pp = false;
-				qreal ppy = list.at(15).trimmed().toFloat(&res);
+				double ppy = list.at(15).trimmed().toDouble(&res);
 				if (!res)
 					pp = false;
 				if (list.at(16).trimmed() == "S")
diff --git a/src/map/wms.cpp b/src/map/wms.cpp
index d324cf72..0f94af56 100644
--- a/src/map/wms.cpp
+++ b/src/map/wms.cpp
@@ -63,7 +63,7 @@ QString WMS::style(QXmlStreamReader &reader)
 
 RectC WMS::geographicBoundingBox(QXmlStreamReader &reader)
 {
-	qreal left = NAN, top = NAN, right = NAN, bottom = NAN;
+	double left = NAN, top = NAN, right = NAN, bottom = NAN;
 
 	while (reader.readNextStartElement()) {
 		if (reader.name() == "westBoundLongitude")
diff --git a/src/map/wmsmap.cpp b/src/map/wmsmap.cpp
index 62d8a784..71059de4 100644
--- a/src/map/wmsmap.cpp
+++ b/src/map/wmsmap.cpp
@@ -10,7 +10,7 @@
 #define CAPABILITIES_FILE "capabilities.xml"
 #define TILE_SIZE 256
 
-qreal WMSMap::sd2res(qreal scaleDenominator) const
+double WMSMap::sd2res(double scaleDenominator) const
 {
 	return scaleDenominator * 0.28e-3 * _projection.units().fromMeters(1.0);
 }
@@ -48,9 +48,9 @@ void WMSMap::computeZooms(const RangeF &scaleDenominator)
 	_zooms.clear();
 
 	if (scaleDenominator.size() > 0) {
-		qreal ld = log2(scaleDenominator.max()) - log2(scaleDenominator.min());
+		double ld = log2(scaleDenominator.max()) - log2(scaleDenominator.min());
 		int cld = ceil(ld);
-		qreal step = ld / (qreal)cld;
+		double step = ld / (qreal)cld;
 		qreal lmax = log2(scaleDenominator.max());
 		for (int i = 0; i <= cld; i++)
 			_zooms.append(pow(2.0, lmax - i * step));
@@ -60,10 +60,10 @@ void WMSMap::computeZooms(const RangeF &scaleDenominator)
 
 void WMSMap::updateTransform()
 {
-	qreal scaleDenominator = _zooms.at(_zoom);
+	double scaleDenominator = _zooms.at(_zoom);
 	ReferencePoint tl, br;
 
-	qreal pixelSpan = sd2res(scaleDenominator);
+	double pixelSpan = sd2res(scaleDenominator);
 	if (_projection.isGeographic())
 		pixelSpan /= deg2rad(WGS84_RADIUS);
 
@@ -150,7 +150,7 @@ void WMSMap::emitLoaded()
 
 QRectF WMSMap::bounds() const
 {
-	qreal pixelSpan = sd2res(_zooms.at(_zoom));
+	double pixelSpan = sd2res(_zooms.at(_zoom));
 	if (_projection.isGeographic())
 		pixelSpan /= deg2rad(WGS84_RADIUS);
 	QSizeF size(_boundingBox.width() / pixelSpan, -_boundingBox.height()
@@ -176,7 +176,7 @@ int WMSMap::zoomFit(const QSize &size, const RectC &br)
 		QRectF tbr(_projection.ll2xy(br.topLeft()),
 		  _projection.ll2xy(br.bottomRight()));
 		QPointF sc(tbr.width() / size.width(), tbr.height() / size.height());
-		qreal resolution = qMax(qAbs(sc.x()), qAbs(sc.y()));
+		double resolution = qMax(qAbs(sc.x()), qAbs(sc.y()));
 		if (_projection.isGeographic())
 			resolution *= deg2rad(WGS84_RADIUS);
 
diff --git a/src/map/wmsmap.h b/src/map/wmsmap.h
index 1e2c2336..cf8a0307 100644
--- a/src/map/wmsmap.h
+++ b/src/map/wmsmap.h
@@ -46,7 +46,7 @@ private slots:
 
 private:
 	QString tileUrl(const QString &version) const;
-	qreal sd2res(qreal scaleDenominator) const;
+	double sd2res(double scaleDenominator) const;
 	QString tilesDir() const;
 	void computeZooms(const RangeF &scaleDenominator);
 	void updateTransform();
@@ -62,7 +62,7 @@ private:
 	Projection _projection;
 	Transform _transform;
 	CoordinateSystem _cs;
-	QVector<qreal> _zooms;
+	QVector<double> _zooms;
 	QRectF _boundingBox;
 	int _zoom;
 	bool _block;
diff --git a/src/map/wmts.h b/src/map/wmts.h
index 728e7cbe..ccdc1661 100644
--- a/src/map/wmts.h
+++ b/src/map/wmts.h
@@ -54,7 +54,7 @@ public:
 	class Zoom
 	{
 	public:
-		Zoom(const QString &id, qreal scaleDenominator, const QPointF &topLeft,
+		Zoom(const QString &id, double scaleDenominator, const QPointF &topLeft,
 		  const QSize &tile, const QSize &matrix, const QRect &limits) :
 		  _id(id), _scaleDenominator(scaleDenominator), _topLeft(topLeft),
 		  _tile(tile), _matrix(matrix), _limits(limits) {}
@@ -62,7 +62,7 @@ public:
 		  {return _scaleDenominator > other._scaleDenominator;}
 
 		const QString &id() const {return _id;}
-		qreal scaleDenominator() const {return _scaleDenominator;}
+		double scaleDenominator() const {return _scaleDenominator;}
 		const QPointF &topLeft() const {return _topLeft;}
 		const QSize &tile() const {return _tile;}
 		const QSize &matrix() const {return _matrix;}
@@ -70,7 +70,7 @@ public:
 
 	private:
 		QString _id;
-		qreal _scaleDenominator;
+		double _scaleDenominator;
 		QPointF _topLeft;
 		QSize _tile;
 		QSize _matrix;
@@ -94,7 +94,7 @@ public:
 private:
 	struct TileMatrix {
 		QString id;
-		qreal scaleDenominator;
+		double scaleDenominator;
 		QPointF topLeft;
 		QSize tile;
 		QSize matrix;
diff --git a/src/map/wmtsmap.cpp b/src/map/wmtsmap.cpp
index 38c06ba9..0b8019ae 100644
--- a/src/map/wmtsmap.cpp
+++ b/src/map/wmtsmap.cpp
@@ -62,7 +62,7 @@ QString WMTSMap::tilesDir() const
 	return QString(TILES_DIR + "/" + _name);
 }
 
-qreal WMTSMap::sd2res(qreal scaleDenominator) const
+double WMTSMap::sd2res(double scaleDenominator) const
 {
 	return scaleDenominator * 0.28e-3 * _projection.units().fromMeters(1.0);
 }
@@ -75,7 +75,7 @@ void WMTSMap::updateTransform()
 	QPointF topLeft = (_cs.axisOrder() == CoordinateSystem::YX)
 	  ? QPointF(z.topLeft().y(), z.topLeft().x()) : z.topLeft();
 
-	qreal pixelSpan = sd2res(z.scaleDenominator());
+	double pixelSpan = sd2res(z.scaleDenominator());
 	if (_projection.isGeographic())
 		pixelSpan /= deg2rad(WGS84_RADIUS);
 	QPointF tileSpan(z.tile().width() * pixelSpan, z.tile().height() * pixelSpan);
diff --git a/src/map/wmtsmap.h b/src/map/wmtsmap.h
index 466bae00..a1c4c969 100644
--- a/src/map/wmtsmap.h
+++ b/src/map/wmtsmap.h
@@ -46,7 +46,7 @@ private slots:
 
 private:
 	bool loadWMTS();
-	qreal sd2res(qreal scaleDenominator) const;
+	double sd2res(double scaleDenominator) const;
 	QString tilesDir() const;
 	void updateTransform();